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Materi : Program LinearBahasan : Persamaan Linear 2 Variabel
Jawaban : - 7
Langkah - langkah :
4x + y = 1
4x = 1 - y
x = (1 - y) / 4
Substitusi ke 3x + 2y = - 3
3((1 - y) / 4) + 2y = - 3
Kalikan 4 :
3(1 - y) + 8y = - 12
3 - 3y + 8y = - 12
5y = - 15
y = - 3
Substitusi ke 4x + y = 1
4x + (- 3) = 1
4x = 4
x = 1
Substitusi ke 2x + 3y
2(1) + 3(- 3)
2 - 9
- 7